13 Replies
@Gyro Gearloose
Note for OP
+solved @user1 @user2... to close the thread when your doubt is solved. Mention the users who helped you solve the doubt. This will be added to their stats.W is weight, acceleration is (n-1)W/m=(n-1)g
So here it becomes (2a/(n-1)g)^1/2
Dude this is Magnet or Achiever?
Magnet
Got it
Thanks
I am having a hard time understanding this
Okk wait I got it but still where does the n come from in numerator
Ans is 3
question says "from rest to rest", so it is not constant acceleration motion throughout. first accelerates at max accln which you found and then at some point it will start decelerating so it can come to rest. so you have to find the time of both and add
i realized that when i asked my teacher today
but my teacher was not getting n in numerator
she was getting n in denominator
what did she take as deceleration value?
she let g be the deceleration
since we can only pull rope from above
so v=gt' , where v is final velocity of accelerating phase and t' is time of decelerating phase
v= (n-1)gt so t'=(n-1)t
so t+t' = nt
